Why choose a capacitive touch screen

- Jan 29, 2019-

Let's take a look at the differences between capacitive touch screens and the many different types of touch screens that are popular.

Capacitive touch screen

Capacitive touch screen is a transparent relative positioning system, first it must be transparent, transparent achievement is the process of material technology to solve.Second, it can give the relative coordinates of the finger touch, and the mouse belongs to the relative positioning system.The relative coordinate system is characterized by that the coordinate of each positioning has nothing to do with the coordinate of the last positioning. In physics, the touch screen is a set of independent coordinate positioning system, and the position of each touch is converted into the coordinate on the screen.

Touch screen of the basic things as follows: the touch screen is the nature of sensor, users touch device with fingers or other objects in the indicator on the touch screen, by touch location coordinates by touch screen controller detection, communication interface and course process metaphor (S - 232 - c or RS 485 serial port) will touch information transmitted to the PLC, and input information is obtained.For example, the capacitive touch screen tea table produced by marvel culture is highly sensitive to touch and supports 4-12 people to operate at the same time. It is suitable for wide application in many fields such as catering, cinema, office building, leisure club, coffee shop, beauty club, KTV and bar.

Nano touch screen

Touch touch film and nano film, English name iFoil or interactive foil or touch foil or Touchfilm, is a kind of transparent film, to or through the base (refers to non-metallic substrates, including glass, acrylic, wood, plastic, etc.) accurate feel the touch of a man's hand, is the core of the touchscreen device such as a precise positioning components, nervous solve the precise positioning touch achievement.It is composed of PET film (polyethylene terephthalate, a kind of transparent flexible plastic resistant to high temperature and degradation), nanowire (ultra-fine wire made by sintering metal nanoparticles), control circuit board and driving software.

X axis nanowires and Y axis of the wire, according to certain rules by digital automation equipment to the packaging within the PET film, thus constitute think matrix, each metric unit is a proximity sensor, can or different azimuth of touch perception, holographic touch feel matrix, the matrix units will be perceived by touch feel matrix flag signal input to the control chip, again by eliminating noise control chip, and will effectively touch the flag led to grassroots driver software, so as to achieve accurate positioning, trigger action, realize the function of the touch.


Infrared touch screen

Infrared touch screen is the use of X, Y direction on the infrared matrix to detect and locate the user's touch.The infrared touch screen is equipped with an outer frame of a circuit board in the front of the display device.When the user touches the screen, the finger will block two infrared ray lines at the end of the screen, so that it can or can not determine the position of the touch point on the screen.The external touch screen is a highly integrated electronic road integration product.The infrared touch screen includes a complete integrated control circuit, and a set of high-precision, anti-interference infrared transmitting tube and a set of infrared receiving tube. The two opposite directions of the cross device on the highly integrated circuit board constitute an invisible infrared grating.An intelligent control system embedded in the control circuit continuously pulses the diode to form a grid of infrared deflector beams.When an object, such as a finger, is touched into the grating, it blocks the beam.The intelligent control system will detect the light loss change and transmit the flag light to the control system to confirm the X-axis and Y-axis coordinates.

The three have their own good, infrared than nano technology is a little more mature, the response time so many microseconds, but nano life is longer than the infrared, and nano products into the tea table is waterproof anti ash explosion proof!And it's lighter.The touch sensitivity of the capacitor is higher than that of the nano, which is not affected by the light environment. In addition, the product made by the capacitor is more sensitive than the nano tea table, with stronger explosion-proof performance and more stable performance.